MORTGAGE SERVICING RIGHTS - Changes in mortgage servicing rights (Details) - Changes in mortgage servicing rights - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Mortgage Servicing Rights
Balance, beginning of period		$ 296	$ 456	$ 339	$ 487
Originated		14	24	38	45
Amortization	[1]	(69)	(64)	(136)	(116)
Balance, end of period		241	416	241	416
Valuation Allowance
Balance, beginning of period		(25)	(24)	(23)	(4)
Decrease (increase) in impairment reserve	[1]	1	(1)	(1)	(21)
Balance, end of period		(24)	(25)	(24)	(25)
Mortgage servicing rights, net		$ 217	$ 391	$ 217	$ 391

[1] (1) Amortization expense and changes in the impairment reserve are recorded in mortgage servicing, net.